I learnt about Bielefeld University’s Teutoburger World Tandem Program at the Welcome Center’s  international spouse and partner coffee morning (see post below). This is a great program if you are interested in having a conversational partner to speak German with. They recommend you are able to speak German at least around B1 level . The program is open to any native speaker of a foreign language who would like to be paired with a german student.  You also don’t have to live in Bielefeld to particpate as some students are happy to converse by Skype.